particle-zoo-subatomic-safety-reflectors

The positively charged PROTON and the neutral NEUTRON, are building block of atomic nuclei. Along with electrons, protons and neutrons are what make up you and me! The PHOTONis the massless wave-particle, bearer of light. Moving at the speed of light, photons make safety reflectors work!The HIGGS PARTICLE was discovered in 2013, 50 years after its prediction to provide an explanation for the origins of mass. In the early universe, DARK MATTER was evenly distributed but the passage of time has left its mark and gravity has pulled it into clumps and empty spaces. Scientists have still not figured out exactly what dark matter is! Albert Einstein predicted the existence of GRAVITATIONAL WAVES already in 1916. It took experimentalists 100 years to figure out how to measure, build the apparatus and actually detect gravitational waves.